Frater, H. (1998). Landforms of the earth: Cause, course, effect, animation. Springer electronic media.
Chicago-stil citatFrater, Harald. Landforms of the Earth: Cause, Course, Effect, Animation. Berlin: Springer electronic media, 1998.
MLA-referensFrater, Harald. Landforms of the Earth: Cause, Course, Effect, Animation. Springer electronic media, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.